Improvement in bobbin-winders



JOHN L. DEMAREST.

Improvement in Bobbin-Winders.

No.127,155, Pate ntedMay 28J872.

Witnesses. Inventor.

4M. P/r'lJTOi/THUGRAP/f/C ca Al. x {ossamvss Moms) machine with myinvention attached.

UNITED STATES JOHN L. DEMAREST, OF ELMIRA, NEW YORK, ASSIGNOR TO HIMSELFAND PATENT OFFICE.

FBEDERIG W. SMITH, OF SAME PLAO IMPROVEMENT IN BOBBIN-WINDERS.

Specification forming part of Letters Patent No. 127,155, dated May 28,1872.

I JOHN L. DEMAREST, of the city of Elmira, county of Ghemun g, and Stateof NewYork, have invented certain Improvements in Sewing-MachineBobbin-Winders, of which the following is a specification:

My invention is applicable to that class of sewing-machines which employa flat bobbin.

Figure 1 is a partial side view of a sewing- Fig. 2 is an end' view ofthe same. Fig. 3 isa plan view of the same.

The bobbin A to be wound is placed, as is customary, on the spindle H ofthe sewingmachine, and the thread from the spool L, instead of beingheld by the fingers as the bobbin revolves, is passed around the tensionB, and thence to the bobbin A. Now, on opera-ting the sewing-machine thethread will be wound up on the bobbin A (by the rotation of the shaft H)compactly and uniformly by the action of the tension B. This willcontinue until the bobbin A is filled, when the thread will override andslip over the edge of the bobbin, down upon the knife 0, and beinstantly out off. To cause the threadto slip ofi upon the knife 0 withcertainty when the bobbin is full, the tension B is placed a shortdistance to that side of the bobbin against which rests the knife 0. Theknife 0 is curved toward the bobbin A to insure its catching the thread,

and by its elasticity accommodates itself to any variation in theposition of the bobbin A on the spindle H. The knifeG might be placedabove, below, or on either side of the bobbin, and can be hinged orotherwise arranged to allow of moving it aside when the bobbin is beingchanged should this be thought desirable. The tension B might be placedupon the top of the spool L, and the thread passed from the spool to thebobbin, at an angle, by means of a carrying loop or pulley placed at oneside of the bobbin A, instead of the tension 13.

I claim as my invention-- 1. The adjustable tension 13 for tighteningthe thread as it is wound upon the bobbin A, when such tension is soplaced that the thread passes from it or a carrying loop at an angle tothe bobbin A, for the purpose specified.

2. The knife 0, combined with the bobbin A, for the purpose of cuttingoif the thread when the bob bin is full, the whole arrangedsubstantially as and for the purposes hereinbefore described.

J N O. L. DEMAREST.

Witnesses HENRY W. BULKLEY, W. H. GooDonILD.

